Remote Control Encoder IC

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Felicity Randall
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1 DESCRIPTION is a remote control encoder paired with PT2294 utilizing CMOS Technology. It encodes data and address pins into a serial coded waveform suitable for RF modulation. has a maximum of 12-bit of tri-state address pins providing up to 531,441 (or 3 12 ) address codes; thereby, drastically reducing any code collision and unauthorized code scanning possibilities. FEATURES CMOS technology Low power consumption Very high noise immunity Up to 12 Tri-State code address pins Up to 4 data pins Wide range of operating voltage: VCC=8 ~ 15V Single resistor oscillator Latch or momentary output type Available in DIP and SOP package APPLICATIONS Remote control fan Home security/automation system Remote control toys Remote control for door bell V April, 2006

2 BLOCK DIAGRAM A0 A1 A2 System Timing OSC OSC1 OSC2 A3 A4 A5 A6 Address Control Logic /TE A7 A8/D3 A9/D2 A10/D1 A11/D0 Code Generation DOUT V April, 2006

3 PIN CONFIGURATION A VCC A VCC A1 A DOUT OSC2 A1 A DOUT OSC2 A OSC1 A OSC1 A /TE A /TE A A11/D0 A A11/D0 A A10/D1 A A10/D1 A7 VSS A9/D2 A8/D3 A7 VSS A9/D2 A8/D3-18S NC S NC V April, 2006

4 PIN DESCRIPTION Pin Name I/O Description A0 ~ A7 A8/D3 ~ A11/D0 /TE I I I Code Address Pin No.0 ~ 7 These ten tri-state pins are detected by to determine the encoded waveform bit 0 ~ bit 9. Each pin can be set to 0, 1 or f (floating). Code Address Pin Nos.8 ~ 11/Data Pin No.0 ~ 3. These four tri-state pins are detected by to determine the encoded waveform bit 10, bit 11. When these pins are used as address pins, they can be set to 0, 1, or f (floating). When these pins are used as data pins, they can be set only to 0 or 1. Transmission Enable. Active Low Signal. outputs the encoded waveform to DOUT when this pin is pulled to low. Pin No. 18 Pins 20 Pins 1 ~ 8 1 ~ 8 10 ~ ~ OSC1 O Oscillator Pin No.1 A resistor connected between these two pins determine the OSC2 I Oscillator Pin No.2 fundamental frequency of the DOUT O Data Output Pin. The encoded waveform is serially outputted to this pin. When is not transmitting, DOUT outputs low (VSS) voltage VCC - Positive Power Supply VSS - Negative Power Supply 9 9 V April, 2006

5 FUNCTION DESCRIPTION encodes the code address and data set at A0 ~ A7 and A8/D3 ~ A11/D0 into a special waveform and outputs it to the DOUT when /TE is pulled to 0 (Low State). This waveform is fed to either the RF modulator for transmission. The transmitted radio frequency is received by the RF demodulator receiver and reshaped to the special waveform. PT2294 is then used to decode the waveform and set the corresponding output pin(s). Thus completing a remote control encoding and decoding function. RF OPERATION CODE BITS A Code Bit is the basic component of the encoded waveform, and can be classified as either an AD (Address/Data) Bit or a SYNC (Synchronous) Bit. Address/Data (AD) Bit Waveform An AD Bit can be designated as Bit 0, 1 or f if it is in low, high or floating state respectively. One bit waveform consists of 2 pulse cycles. Each pulse cycle has 16 oscillating time periods. For further details, please refer to the diagram below: α OSC BIT 0 4α 1 bit = 32α BIT 1 BIT f Floating 12α 4α where: α=oscillating Clock Period Synchronous (Sync.) Bit Waveform The Synchronous Bit Waveform is 4-bit long with 1/8 bit width pulse. Please refer to the diagram below: 1/8 bit width=4α Note: 1-bit=32α 4 bit width=128α V April, 2006

6 CODE WORD A group of Code Bits is called a Code Word. A Code Word consists of 12 AD bits followed by one Sync Bit. The 12 AD bits are determined by the corresponding states of A0 ~ A7 and A8/D3 ~ A11/D0 pins at the time of transmission. When Data Type of is used, the address bits will decrease accordingly. For example: In the 4 Data Type where the address has eight (8) bits, the transmitting format is: 8 Address Bits 4 Data Bits Sync. bit /PT2294 have a maximum of twelve (12) Address Bits, four (4) Address/Data bits. The following diagram shows the code bits with their corresponding pins. First bit transmitted A0 A1 A2 A3 A4 A5 A6 A7 A8/D3 A9/D2 A10/D1 A11/D0 SYNC BIT One Complete Code Word 0 Data A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 Sync Bit 1 Data A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 D0 Sync Bit 2 Data A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 D1 D0 Sync Bit 3 Data A0 A1 A2 A3 A4 A5 A6 A7 A8 D2 D1 D0 Sync Bit 4 Data A0 A1 A2 A3 A4 A5 A6 A7 D3 D2 D1 D0 Sync Bit The Code Bits A0 ~ A7 and A8/D3 ~ A11/D0 are determined by the states of A0 ~ A7 and A8/D3 ~ A11/D0 pins. For example, when the A0 (Pin No. 1) is set to 1 (VCC), the Code Bit A0 is synthesized as 1 bit. In the same manner, when it (A0 Pin) is set to 0 (VSS) or left floating, the Code Bit A0 is synthesized as a 0 or f bit respectively. V April, 2006

7 CODE FRAME A Code Frame consists of four (4) continuous Code Words. When detects 0 on the /TE (meaning, the /TE is active low ), it outputs a Code Frame at DOUT. If /TE is still active at the time the Code Frame transmission ends, outputs another Code Frame. It should be noted that the Code Frame is synthesized at the time of transmission. /TE DOUT one frame (=4 word) one frame one frame SIGNAL RESISTOR OSCILLATOR The built in oscillator circuitry of allows a precision oscillator to be constructed by connecting an external resistor between OSC1 and OSC2 pins. For PT2294 to decode correctly the received waveform, the oscillator frequency of PT2294 must be 2.5 ~ 8 times that of transmitting. The typical oscillator with various resistor values are shown below for and PT R = 510 K KHz 10 R = 1 M R = 2 M R = 3.3 M R = 4.7 M V O L T A G E Encoder OSC Frequency V April, 2006

8 PT2294 DECODER OSC FREQUENCY FREQUENCY (KHz) VOLTAGE (V) Rosc =510KΩ Rosc=620KΩ Rosc=1.0MΩ Rosc=1.2MΩ Rosc=2.2 MΩ Suggested oscillator resistor values are shown below. 1.2MΩ 1.5MΩ 3.3MΩ PT KΩ 160KΩ 390KΩ V April, 2006

9 OPERATION FLOW CHART Power ON Stand-by Mode No /TE Enable Yes 4 Words of Address/Data Transmitted Yes No /TE Still Enable Yes V April, 2006

10 ABSOLUTE MAXIMUM RATINGS Parameter Symbol Condition Rating Unit Supply voltage VCC -0.3 ~ 16.0 V Input voltage VI -0.3 ~ VCC+0.3 V Output voltage VO -0.3 ~ VCC+0.3 V Maximum power dissipation Pa VCC=12 V 300 mw Operating temperature Topr -40 ~ +85 Storage temperature Tstg -65 ~ +150 DC ELECTRICAL CHARACTERISTICS Parameter Symbol Conditions Min. Typ. Max. Unit Supply voltage VCC V Stand-by current ISB VCC=12V OSC2=12V A0 ~ A11 Open DOUT output driving current DOUT output sinking current IOH IOL VCC=8V VOH=4V VCC=12V VOH=6V VCC=8V VOL=4V VCC=12V VOL=6V µa ma ma ma ma V April, 2006

11 APPLICATION CIRCUIT 4 Data transmitter circuit is recommended. Pin 1~8 Address Data can be selected by custom s design. RF 1 A0 VCC 18 2 A1 DOUT 17 3 A2 OSC A3 OSC A4 /TE 14 6 A5 A11/D A6 A10/D A7 A9/D VSS A8/D3 10 Rosc IN4148 x 4 2.7K x 4 10K x 4 SW3 SW2 SW1 SW0-12V + Note: Suggested oscillator resistor values (Rosc), please refer to page 7. V April, 2006

12 Zero Data transmitter circuit is recommended. Pin 1~8, Pin 10~13 Address Data can be selected by custom s design. VCC RF 1 A0 VCC 18 2 A1 DOUT 17 3 A2 OSC A3 OSC A4 /TE 14 6 A5 A11/D A6 A10/D A7 A9/D VSS A8/D3 10 Rosc SW Note: Suggested oscillator resistor values (Rosc), please refer to page 7. Zero-Stand-by transmitter circuit is recommended. Pin 1~8, Pin 10~13 Address Data can be selected by custom s design. RF 1 A0 VCC 18 2 A1 DOUT 17 3 A2 OSC A3 OSC A4 /TE 14 6 A5 A11/D A6 A10/D A7 A9/D VSS A8/D3 10 Rosc SW V Note: Suggested oscillator resistor values (Rosc), please refer to page 7. V April, 2006

13 ORDER INFORMATION Valid Part Number Package Type Top Code 18 Pins, DIP, 300mil -18S 18 Pins, SOP, 300mil -18S -S 20 Pins, SOP, 300mil -S V April, 2006

14 PACKAGE INFORMATION 18 PINS, DIP, 300MIL V April, 2006

15 Symbol Min. Nom. Max. A A A b b b b c c D D E E e bsc. ea bsc. eb ec L Notes: 1. All dimensions are in INCHS. 2. Dimensioning and tolerancing per ANSI Y14.5M Dimensions A, A1 and L are measured with the package seated in JEDEC Seating Plane Gauge GS D, D1 and E1 dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed inch. 5. E and ea measured with the leads constrained to be perpendicular to datum -c-. 6. eb and ec are measured at the lead tips with the loads unconstrained. 7. N is the number of terminal positions. (N=18) 8. Pointed or rounded lead tips are preferred to ease insertion. 9. b2 and b3 maximum dimensions are not include dambar protrusions. Dambar protrusions shall not exceed inch (0.25 mm). 10. Distance between leads including Dambar protrusions to be inch minimum. 11. Datum plane -H- coincident with the bottom of lead, where lead exits body. 12. Refer to JEDEC MS-001 Variation AC. JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION. V April, 2006

16 18 PINS, SOP, 300MIL N INDEX AREA E H.25 (.010) M B M -B L -A- D SEATING PLANE A h X 45 -C- -e- B.25 (.010) M C A M B S A1.10 (.004) C Symbol Min. Nom. Max. A A B C D E e 1.27 bsc. H h L α 0 8 V April, 2006

17 Notes: 1. Dimensioning and tolerancing per ANSI Y14.5M Dimension D does not include mold flash, protrusions or gate burrs. Mold Flash, protrusion or gate burrs shall not exceed 0.15 mm (0.006 in) per side. 3. Dimension E does not include interlead flash or protrusions. Interlead flash or protrusions shall not exceed 0.25 mm (0.010 in) per side. 4. The chamfer on the body is optional. It is not present, a visual index feature must be located within the crosshatched area. 5. L is the length of the terminal for soldering to a substrate. 6. N is the number of the terminal positions (N=18) 7. The lead width B as measured 0.36 mm (0.014 in) or greater above the seating plane, shall not exceed a maximum value of 0.61 mm (0.24 in). 8. Controlling dimension: MILLIMETER. 9. Refer to JEDEC MS-013, Variation AB. JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION. V April, 2006

18 20 PINS, SOP, 300MIL N INDEX AREA E H.25 (.010) M B M -B L -A- D SEATING PLANE A h X 45 -C- -e- B.25 (.010) M C A M B S A1.10 (.004) C Symbol Min. Nom. Max. A A B C D E e 1.27 bsc. H h L α 0 8 V April, 2006

19 Notes: 1. Dimensioning and tolerancing per ANSI Y14.5M Dimension D does not include mold flash, protrusions or gate burrs. Mold Flash, protrusion or gate burrs shall not exceed 0.15 mm (0.006 in) per side. 3. Dimension E does not include interlead flash or protrusions. Interlead flash or protrusions shall not exceed 0.25 mm (0.010 in) per side. 4. The chamfer on the body is optional. It is not present, a visual index feature must be located within the crosshatched area. 5. L is the length of the terminal for soldering to a substrate. 6. N is the number of the terminal positions (N=20) 7. The lead width B as measured 0.36 mm (0.014 in) or greater above the seating plane, shall not exceed a maximum value of 0.61 mm (0.24 in). 8. Controlling dimension: MILLIMETER. 9. Refer to JEDEC MS-013, Variation AC. JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION. V April, 2006

Remote Control Decoder IC

Remote Control Decoder IC V1.2-1 - April, 2006 查询供应商捷多邦, 专业 PCB 打样工厂,24 小时加急出货 DESCRIPTION is a remote control decoder paired with PT2264 utilizing CMOS Technology. It has 12 bits of tri-state address pins providing a maximum